Author:
Li Shaowei,Fan Daojin,Gong Ming,Ye Yangsen,Chen Xiawei,Wu Yulin,Guan Huijie,Deng Hui,Rong Hao,Huang He-Liang,Zha Chen,Yan Kai,Guo Shaojun,Qian Haoran,Zhang Haibin,Chen Fusheng,Zhu Qingling,Zhao Youwei,Wang Shiyu,Ying Chong,Cao Sirui,Yu Jiale,Liang Futian,Xu Yu,Lin Jin,Guo Cheng,Sun Lihua,Li Na,Han Lianchen,Peng Cheng-Zhi,Zhu Xiaobo,Pan Jian-Wei
Abstract
The development of high-fidelity two-qubit quantum gates is essential for digital quantum computing. Here, we propose and realize an all-microwave parametric controlled-Z (CZ) gates by coupling strength modulation in a superconducting Transmon qubit system with tunable couplers. After optimizing the design of the tunable coupler together with the control pulse numerically, we experimentally realized a 100 ns CZ gate with high fidelity of 99.38% ± 0.34% and the control error being 0.1%. We note that our CZ gates are not affected by pulse distortion and do not need pulse correction, providing a solution for the real-time pulse generation in a dynamic quantum feedback circuit. With the expectation of utilizing our all-microwave control scheme to reduce the number of control lines through frequency multiplexing in the future, our scheme draws a blueprint for the high-integrable quantum hardware design.
Subject
General Physics and Astronomy
Cited by
5 articles.
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